Rate and selectivity enhancements mediated by OH radicals in the oxidative coupling of methane catalyzed by Mn/Na2WO4/SiO2

被引：118

作者：

Takanabe, Kazuhiro ^{[1
]}

Iglesia, Enrique ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2008年 / 47卷 / 40期

关键词：

hydrogen abstraction; kinetics; oxidative coupling of methane; radical reactions; reaction mechanisms;

D O I：

10.1002/anie.200802608

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Radically Improved: OH radicals formed by quasi-equilibrated steps on oxide surfaces introduce homogeneous pathways that lead to higher rates and C 2 yields in oxidative methane coupling relative to those attained by CH4 activation with chemisorbed oxygen (see picture; O*: dissociated oxygen atom; R: abstractor). The reactivity of OH. leads to a weaker influence of the C-H bond energies on the relative rates of H abstraction from CH4, C2H6, and C 2H4. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

页码：7689 / 7693

页数：5

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